Primary Node Is Hung in Demoting During a Switchover
Symptom
In a cluster deployed with one primary and multiple standby DNs, if system resources are insufficient and a switchover occurs, a node is hung in demoting.
Cause Analysis
If system resources are insufficient, the third-party management thread cannot be created. As a result, the managed sub-threads cannot exit and the primary node is hung in demoting.
Procedure
Run the following command to stop the process of the primary node so that the standby node can be promoted to primary: Perform the following operations only in the preceding scenario.
kill -9 PID
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